All of these, by assumption, mutually non-parallel
bra-vectors have the same structure. The formula
reproduces the
\({K}=3\)  and \({K}=2\)  special cases
appearing in the quasi-Hermitian quantum mechanics of
reviews [1]}, [2]}, [3]}.
The “non-metric”
operator \(Z_{0}\ \)  playing the role of
the physical SP Hamiltonian
does not enter our final definition (REF )
of course.
